FERRITIC STAINLESS STEEL FOR AUTOMOTIVE EXHAUST SYSTEM MEMBER

• Main Authors: TERAOKA SHINICHI, SAKAMOTO TOSHIHARU, HIRAIDE NOBUHIKO
• Format: Patent
• Language: English
• Published: 29.09.2011
• Subjects: ALLOYS; BLASTING; CHEMISTRY; ENGINE PLANTS IN GENERAL; FERROUS OR NON-FERROUS ALLOYS; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; STEAM ENGINES; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

PROBLEM TO BE SOLVED: To provide an Mo-saving ferritic stainless steel for an automotive exhaust system member which can obtain corrosion resistance after heating and workability equal to or above those of SUS 436L(17Cr-1.2Mo series) without incorporating Mo therein. SOLUTION: The ferritic stainless steel for an automotive exhaust system member has a composition comprising, by mass, ≤0.015% C, 0.01 to 0.50% Si, 0.01 to 0.50% Mn, ≤0.050% P, ≤0.010% S, ≤0.015% N, 0.010 to 0.100% Al, 16.5 to 22.5% Cr, 0.5 to 2.0% Ni and 0.01 to 0.50% Sn, further comprising one or two selected from 0.03 to 0.30% Ti and 0.03 to 0.30% Nb, and the balance Fe with inevitable impurities, and, if required, further comprising one or two selected from 0.01 to 0.50% Mo, 0.01 to 0.50% Cu and 0.0005 to 0.0050% B. COPYRIGHT: (C)2011,JPO&INPIT